參數(shù)資料
型號(hào): M34506M4-XXXFP
元件分類: 微控制器/微處理器
英文描述: 4-BIT, MROM, MICROCONTROLLER, PDSO20
封裝: 5.30 X 12.60 MM, 1.27 MM PITCH, PLASTIC, SOP-20
文件頁數(shù): 23/114頁
文件大小: 937K
代理商: M34506M4-XXXFP
7643 Group
Rev.2.00
Aug 28, 2006
page 12 of 119
REJ03B0054-0200
MEMORY
Special Function Register (SFR) Area
The Special Function Register area in the zero page contains control
registers such as I/O ports and timers.
RAM
RAM is used for data storage and for stack area of subroutine calls
and interrupts.
ROM
The first 128 bytes and the last 4 bytes of ROM are reserved for
device testing and the rest is user area for storing programs. In the
flash memory version, program and erase can be performed in the
reserved area.
Interrupt Vector Area
The interrupt vector area contains reset and interrupt vectors.
Zero Page
Access to this area with only 2 bytes is possible in the zero page
addressing mode.
Special Page
Access to this area with only 2 bytes is possible in the special page
addressing mode.
Refer to page 74 for the memory map of memory expansion and
microprocessor modes.
Fig. 9 Memory map diagram
1024
2560
046F16
0A6F16
RAM area
RAM size
(bytes)
Address
XXXX16
000016
007016
FF0016
FFCA16
FFFC16
FFFF16
XXXX16
800016
808016
RAM
ROM
SIZE: 32768 bytes
SFR area
Not used
Interrupt vector area
Reserved ROM area
(128 bytes)
Zero page
Special page
Reserved ROM area
010016
100016
Reserved area (Note 1)
SFR area
(Note 2)
FFC916
M37643M8
M37643F8
Notes 1: Reserved area in M37643F8.
2: SFR area in M37643F8.
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